Portland CDP, Connecticut

Official LSAD Designation: Portland CDP • Census GEOID: 0961870 • Lower Connecticut River Valley Planning Region

Climate Normals & Weather Observations

30-year climate normals (1991–2020) and weather observations for Portland CDP.

Reference Weather Station: HARTFORD BRAINARD FLD, CT US (ID: USW00014752) • Located 11.1 miles from community center • Elevation: 5.8 m

Month	Average High (°F)	Average Low (°F)	Mean Temp (°F)	Precipitation (in)
January	36.8°	20.3°	28.6°	2.94"
February	39.5°	22.1°	30.8°	2.57"
March	47.6°	29.6°	38.6°	3.51"
April	60.1°	40.0°	50.0°	3.79"
May	70.9°	50.1°	60.5°	3.43"
June	79.6°	59.8°	69.7°	3.88"
July	84.6°	65.7°	75.2°	3.87"
August	83.0°	64.2°	73.6°	3.48"
September	75.6°	56.0°	65.8°	3.97"
October	63.7°	44.3°	54.0°	4.20"
November	52.1°	34.6°	43.3°	3.44"
December	41.7°	25.9°	33.8°	3.75"

2010–2025, completed calendar years only.

NOAA station HARTFORD BRAINARD FLD, CT US (ID: USW00014752) • 11.1 miles from community center .

This is the same reference station used for monthly normals.

Show annual mean of daily highs and lows

Annual mean Annual mean of daily highs Annual mean of daily lows

Annual temperature data table (°F)

Annual station temperatures, 2010–2025. Unavailable means no reported value.
Year	Annual mean (°F)	Annual mean of daily highs (°F)	Annual mean of daily lows (°F)
2010	54.4	63.7	45.0
2011	53.1	62.3	43.9
2012	54.5	63.7	45.3
2013	51.9	61.2	42.7
2014	50.4	59.7	41.2
2015	51.7	61.7	41.8
2016	54.6	64.6	44.6
2017	52.6	61.9	43.4
2018	Unavailable	Unavailable	Unavailable
2019	51.9	61.0	42.7
2020	54.6	63.9	45.2
2021	54.0	63.0	44.9
2022	54.0	63.8	44.2
2023	54.7	64.0	45.3
2024	54.5	63.9	45.1
2025	Unavailable	Unavailable	Unavailable

Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.